rev 9344 : 8034998: Fix raw and unchecked lint warnings in javax.imageio
Reviewed-by: darcy, prr

   1 /*
   2  * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package javax.imageio;
  27 
  28 import java.awt.Point;
  29 import java.awt.Transparency;
  30 import java.awt.image.BandedSampleModel;
  31 import java.awt.image.BufferedImage;
  32 import java.awt.image.ColorModel;
  33 import java.awt.color.ColorSpace;
  34 import java.awt.image.IndexColorModel;
  35 import java.awt.image.ComponentColorModel;
  36 import java.awt.image.DataBuffer;
  37 import java.awt.image.DirectColorModel;
  38 import java.awt.image.MultiPixelPackedSampleModel;
  39 import java.awt.image.PixelInterleavedSampleModel;
  40 import java.awt.image.SinglePixelPackedSampleModel;
  41 import java.awt.image.Raster;
  42 import java.awt.image.RenderedImage;
  43 import java.awt.image.SampleModel;
  44 import java.awt.image.WritableRaster;
  45 import java.util.Hashtable;
  46 
  47 /**
  48  * A class that allows the format of an image (in particular, its
  49  * <code>SampleModel</code> and <code>ColorModel</code>) to be
  50  * specified in a convenient manner.
  51  *
  52  */
  53 public class ImageTypeSpecifier {
  54 
  55     /**
  56      * The <code>ColorModel</code> to be used as a prototype.
  57      */
  58     protected ColorModel colorModel;
  59 
  60     /**
  61      * A <code>SampleModel</code> to be used as a prototype.
  62      */
  63     protected SampleModel sampleModel;
  64 
  65     /**
  66      * Cached specifiers for all of the standard
  67      * <code>BufferedImage</code> types.
  68      */
  69     private static ImageTypeSpecifier[] BISpecifier;
  70     private static ColorSpace sRGB;
  71     // Initialize the standard specifiers
  72     static {
  73         sRGB = ColorSpace.getInstance(ColorSpace.CS_sRGB);
  74 
  75         BISpecifier =
  76             new ImageTypeSpecifier[BufferedImage.TYPE_BYTE_INDEXED + 1];
  77     }
  78 
  79     /**
  80      * A constructor to be used by inner subclasses only.
  81      */
  82     private ImageTypeSpecifier() {}
  83 
  84     /**
  85      * Constructs an <code>ImageTypeSpecifier</code> directly
  86      * from a <code>ColorModel</code> and a <code>SampleModel</code>.
  87      * It is the caller's responsibility to supply compatible
  88      * parameters.
  89      *
  90      * @param colorModel a <code>ColorModel</code>.
  91      * @param sampleModel a <code>SampleModel</code>.
  92      *
  93      * @exception IllegalArgumentException if either parameter is
  94      * <code>null</code>.
  95      * @exception IllegalArgumentException if <code>sampleModel</code>
  96      * is not compatible with <code>colorModel</code>.
  97      */
  98     public ImageTypeSpecifier(ColorModel colorModel, SampleModel sampleModel) {
  99         if (colorModel == null) {
 100             throw new IllegalArgumentException("colorModel == null!");
 101         }
 102         if (sampleModel == null) {
 103             throw new IllegalArgumentException("sampleModel == null!");
 104         }
 105         if (!colorModel.isCompatibleSampleModel(sampleModel)) {
 106             throw new IllegalArgumentException
 107                 ("sampleModel is incompatible with colorModel!");
 108         }
 109         this.colorModel = colorModel;
 110         this.sampleModel = sampleModel;
 111     }
 112 
 113     /**
 114      * Constructs an <code>ImageTypeSpecifier</code> from a
 115      * <code>RenderedImage</code>.  If a <code>BufferedImage</code> is
 116      * being used, one of the factory methods
 117      * <code>createFromRenderedImage</code> or
 118      * <code>createFromBufferedImageType</code> should be used instead in
 119      * order to get a more accurate result.
 120      *
 121      * @param image a <code>RenderedImage</code>.
 122      *
 123      * @exception IllegalArgumentException if the argument is
 124      * <code>null</code>.
 125      */
 126     public ImageTypeSpecifier(RenderedImage image) {
 127         if (image == null) {
 128             throw new IllegalArgumentException("image == null!");
 129         }
 130         colorModel = image.getColorModel();
 131         sampleModel = image.getSampleModel();
 132     }
 133 
 134     // Packed
 135 
 136     static class Packed extends ImageTypeSpecifier {
 137         ColorSpace colorSpace;
 138         int redMask;
 139         int greenMask;
 140         int blueMask;
 141         int alphaMask;
 142         int transferType;
 143         boolean isAlphaPremultiplied;
 144 
 145         public Packed(ColorSpace colorSpace,
 146                       int redMask,
 147                       int greenMask,
 148                       int blueMask,
 149                       int alphaMask, // 0 if no alpha
 150                       int transferType,
 151                       boolean isAlphaPremultiplied) {
 152             if (colorSpace == null) {
 153                 throw new IllegalArgumentException("colorSpace == null!");
 154             }
 155             if (colorSpace.getType() != ColorSpace.TYPE_RGB) {
 156                 throw new IllegalArgumentException
 157                     ("colorSpace is not of type TYPE_RGB!");
 158             }
 159             if (transferType != DataBuffer.TYPE_BYTE &&
 160                 transferType != DataBuffer.TYPE_USHORT &&
 161                 transferType != DataBuffer.TYPE_INT) {
 162                 throw new IllegalArgumentException
 163                     ("Bad value for transferType!");
 164             }
 165             if (redMask == 0 && greenMask == 0 &&
 166                 blueMask == 0 && alphaMask == 0) {
 167                 throw new IllegalArgumentException
 168                     ("No mask has at least 1 bit set!");
 169             }
 170             this.colorSpace = colorSpace;
 171             this.redMask = redMask;
 172             this.greenMask = greenMask;
 173             this.blueMask = blueMask;
 174             this.alphaMask = alphaMask;
 175             this.transferType = transferType;
 176             this.isAlphaPremultiplied = isAlphaPremultiplied;
 177 
 178             int bits = 32;
 179             this.colorModel =
 180                 new DirectColorModel(colorSpace,
 181                                      bits,
 182                                      redMask, greenMask, blueMask,
 183                                      alphaMask, isAlphaPremultiplied,
 184                                      transferType);
 185             this.sampleModel = colorModel.createCompatibleSampleModel(1, 1);
 186         }
 187     }
 188 
 189     /**
 190      * Returns a specifier for a packed image format that will use a
 191      * <code>DirectColorModel</code> and a packed
 192      * <code>SampleModel</code> to store each pixel packed into in a
 193      * single byte, short, or int.
 194      *
 195      * @param colorSpace the desired <code>ColorSpace</code>.
 196      * @param redMask a contiguous mask indicated the position of the
 197      * red channel.
 198      * @param greenMask a contiguous mask indicated the position of the
 199      * green channel.
 200      * @param blueMask a contiguous mask indicated the position of the
 201      * blue channel.
 202      * @param alphaMask a contiguous mask indicated the position of the
 203      * alpha channel.
 204      * @param transferType the desired <code>SampleModel</code> transfer type.
 205      * @param isAlphaPremultiplied <code>true</code> if the color channels
 206      * will be premultipled by the alpha channel.
 207      *
 208      * @return an <code>ImageTypeSpecifier</code> with the desired
 209      * characteristics.
 210      *
 211      * @exception IllegalArgumentException if <code>colorSpace</code>
 212      * is <code>null</code>.
 213      * @exception IllegalArgumentException if <code>colorSpace</code>
 214      * is not of type <code>TYPE_RGB</code>.
 215      * @exception IllegalArgumentException if no mask has at least 1
 216      * bit set.
 217      * @exception IllegalArgumentException if
 218      * <code>transferType</code> if not one of
 219      * <code>DataBuffer.TYPE_BYTE</code>,
 220      * <code>DataBuffer.TYPE_USHORT</code>, or
 221      * <code>DataBuffer.TYPE_INT</code>.
 222      */
 223     public static ImageTypeSpecifier
 224         createPacked(ColorSpace colorSpace,
 225                      int redMask,
 226                      int greenMask,
 227                      int blueMask,
 228                      int alphaMask, // 0 if no alpha
 229                      int transferType,
 230                      boolean isAlphaPremultiplied) {
 231         return new ImageTypeSpecifier.Packed(colorSpace,
 232                                              redMask,
 233                                              greenMask,
 234                                              blueMask,
 235                                              alphaMask, // 0 if no alpha
 236                                              transferType,
 237                                              isAlphaPremultiplied);
 238     }
 239 
 240     static ColorModel createComponentCM(ColorSpace colorSpace,
 241                                         int numBands,
 242                                         int dataType,
 243                                         boolean hasAlpha,
 244                                         boolean isAlphaPremultiplied) {
 245         int transparency =
 246             hasAlpha ? Transparency.TRANSLUCENT : Transparency.OPAQUE;
 247 
 248         int[] numBits = new int[numBands];
 249         int bits = DataBuffer.getDataTypeSize(dataType);
 250 
 251         for (int i = 0; i < numBands; i++) {
 252             numBits[i] = bits;
 253         }
 254 
 255         return new ComponentColorModel(colorSpace,
 256                                        numBits,
 257                                        hasAlpha,
 258                                        isAlphaPremultiplied,
 259                                        transparency,
 260                                        dataType);
 261     }
 262 
 263     // Interleaved
 264 
 265     static class Interleaved extends ImageTypeSpecifier {
 266         ColorSpace colorSpace;
 267         int[] bandOffsets;
 268         int dataType;
 269         boolean hasAlpha;
 270         boolean isAlphaPremultiplied;
 271 
 272         public Interleaved(ColorSpace colorSpace,
 273                            int[] bandOffsets,
 274                            int dataType,
 275                            boolean hasAlpha,
 276                            boolean isAlphaPremultiplied) {
 277             if (colorSpace == null) {
 278                 throw new IllegalArgumentException("colorSpace == null!");
 279             }
 280             if (bandOffsets == null) {
 281                 throw new IllegalArgumentException("bandOffsets == null!");
 282             }
 283             int numBands = colorSpace.getNumComponents() +
 284                 (hasAlpha ? 1 : 0);
 285             if (bandOffsets.length != numBands) {
 286                 throw new IllegalArgumentException
 287                     ("bandOffsets.length is wrong!");
 288             }
 289             if (dataType != DataBuffer.TYPE_BYTE &&
 290                 dataType != DataBuffer.TYPE_SHORT &&
 291                 dataType != DataBuffer.TYPE_USHORT &&
 292                 dataType != DataBuffer.TYPE_INT &&
 293                 dataType != DataBuffer.TYPE_FLOAT &&
 294                 dataType != DataBuffer.TYPE_DOUBLE) {
 295                 throw new IllegalArgumentException
 296                     ("Bad value for dataType!");
 297             }
 298             this.colorSpace = colorSpace;
 299             this.bandOffsets = bandOffsets.clone();
 300             this.dataType = dataType;
 301             this.hasAlpha = hasAlpha;
 302             this.isAlphaPremultiplied = isAlphaPremultiplied;
 303 
 304             this.colorModel =
 305                 ImageTypeSpecifier.createComponentCM(colorSpace,
 306                                                      bandOffsets.length,
 307                                                      dataType,
 308                                                      hasAlpha,
 309                                                      isAlphaPremultiplied);
 310 
 311             int minBandOffset = bandOffsets[0];
 312             int maxBandOffset = minBandOffset;
 313             for (int i = 0; i < bandOffsets.length; i++) {
 314                 int offset = bandOffsets[i];
 315                 minBandOffset = Math.min(offset, minBandOffset);
 316                 maxBandOffset = Math.max(offset, maxBandOffset);
 317             }
 318             int pixelStride = maxBandOffset - minBandOffset + 1;
 319 
 320             int w = 1;
 321             int h = 1;
 322             this.sampleModel =
 323                 new PixelInterleavedSampleModel(dataType,
 324                                                 w, h,
 325                                                 pixelStride,
 326                                                 w*pixelStride,
 327                                                 bandOffsets);
 328         }
 329 
 330         public boolean equals(Object o) {
 331             if ((o == null) ||
 332                 !(o instanceof ImageTypeSpecifier.Interleaved)) {
 333                 return false;
 334             }
 335 
 336             ImageTypeSpecifier.Interleaved that =
 337                 (ImageTypeSpecifier.Interleaved)o;
 338 
 339             if ((!(this.colorSpace.equals(that.colorSpace))) ||
 340                 (this.dataType != that.dataType) ||
 341                 (this.hasAlpha != that.hasAlpha) ||
 342                 (this.isAlphaPremultiplied != that.isAlphaPremultiplied) ||
 343                 (this.bandOffsets.length != that.bandOffsets.length)) {
 344                 return false;
 345             }
 346 
 347             for (int i = 0; i < bandOffsets.length; i++) {
 348                 if (this.bandOffsets[i] != that.bandOffsets[i]) {
 349                     return false;
 350                 }
 351             }
 352 
 353             return true;
 354         }
 355 
 356         public int hashCode() {
 357             return (super.hashCode() +
 358                     (4 * bandOffsets.length) +
 359                     (25 * dataType) +
 360                     (hasAlpha ? 17 : 18));
 361         }
 362     }
 363 
 364     /**
 365      * Returns a specifier for an interleaved image format that will
 366      * use a <code>ComponentColorModel</code> and a
 367      * <code>PixelInterleavedSampleModel</code> to store each pixel
 368      * component in a separate byte, short, or int.
 369      *
 370      * @param colorSpace the desired <code>ColorSpace</code>.
 371      * @param bandOffsets an array of <code>int</code>s indicating the
 372      * offsets for each band.
 373      * @param dataType the desired data type, as one of the enumerations
 374      * from the <code>DataBuffer</code> class.
 375      * @param hasAlpha <code>true</code> if an alpha channel is desired.
 376      * @param isAlphaPremultiplied <code>true</code> if the color channels
 377      * will be premultipled by the alpha channel.
 378      *
 379      * @return an <code>ImageTypeSpecifier</code> with the desired
 380      * characteristics.
 381      *
 382      * @exception IllegalArgumentException if <code>colorSpace</code>
 383      * is <code>null</code>.
 384      * @exception IllegalArgumentException if <code>bandOffsets</code>
 385      * is <code>null</code>.
 386      * @exception IllegalArgumentException if <code>dataType</code> is
 387      * not one of the legal <code>DataBuffer.TYPE_*</code> constants.
 388      * @exception IllegalArgumentException if
 389      * <code>bandOffsets.length</code> does not equal the number of
 390      * color space components, plus 1 if <code>hasAlpha</code> is
 391      * <code>true</code>.
 392      */
 393     public static ImageTypeSpecifier
 394         createInterleaved(ColorSpace colorSpace,
 395                           int[] bandOffsets,
 396                           int dataType,
 397                           boolean hasAlpha,
 398                           boolean isAlphaPremultiplied) {
 399         return new ImageTypeSpecifier.Interleaved(colorSpace,
 400                                                   bandOffsets,
 401                                                   dataType,
 402                                                   hasAlpha,
 403                                                   isAlphaPremultiplied);
 404     }
 405 
 406     // Banded
 407 
 408     static class Banded extends ImageTypeSpecifier {
 409         ColorSpace colorSpace;
 410         int[] bankIndices;
 411         int[] bandOffsets;
 412         int dataType;
 413         boolean hasAlpha;
 414         boolean isAlphaPremultiplied;
 415 
 416         public Banded(ColorSpace colorSpace,
 417                       int[] bankIndices,
 418                       int[] bandOffsets,
 419                       int dataType,
 420                       boolean hasAlpha,
 421                       boolean isAlphaPremultiplied) {
 422             if (colorSpace == null) {
 423                 throw new IllegalArgumentException("colorSpace == null!");
 424             }
 425             if (bankIndices == null) {
 426                 throw new IllegalArgumentException("bankIndices == null!");
 427             }
 428             if (bandOffsets == null) {
 429                 throw new IllegalArgumentException("bandOffsets == null!");
 430             }
 431             if (bankIndices.length != bandOffsets.length) {
 432                 throw new IllegalArgumentException
 433                     ("bankIndices.length != bandOffsets.length!");
 434             }
 435             if (dataType != DataBuffer.TYPE_BYTE &&
 436                 dataType != DataBuffer.TYPE_SHORT &&
 437                 dataType != DataBuffer.TYPE_USHORT &&
 438                 dataType != DataBuffer.TYPE_INT &&
 439                 dataType != DataBuffer.TYPE_FLOAT &&
 440                 dataType != DataBuffer.TYPE_DOUBLE) {
 441                 throw new IllegalArgumentException
 442                     ("Bad value for dataType!");
 443             }
 444             int numBands = colorSpace.getNumComponents() +
 445                 (hasAlpha ? 1 : 0);
 446             if (bandOffsets.length != numBands) {
 447                 throw new IllegalArgumentException
 448                     ("bandOffsets.length is wrong!");
 449             }
 450 
 451             this.colorSpace = colorSpace;
 452             this.bankIndices = bankIndices.clone();
 453             this.bandOffsets = bandOffsets.clone();
 454             this.dataType = dataType;
 455             this.hasAlpha = hasAlpha;
 456             this.isAlphaPremultiplied = isAlphaPremultiplied;
 457 
 458             this.colorModel =
 459                 ImageTypeSpecifier.createComponentCM(colorSpace,
 460                                                      bankIndices.length,
 461                                                      dataType,
 462                                                      hasAlpha,
 463                                                      isAlphaPremultiplied);
 464 
 465             int w = 1;
 466             int h = 1;
 467             this.sampleModel = new BandedSampleModel(dataType,
 468                                                      w, h,
 469                                                      w,
 470                                                      bankIndices,
 471                                                      bandOffsets);
 472         }
 473 
 474         public boolean equals(Object o) {
 475             if ((o == null) ||
 476                 !(o instanceof ImageTypeSpecifier.Banded)) {
 477                 return false;
 478             }
 479 
 480             ImageTypeSpecifier.Banded that =
 481                 (ImageTypeSpecifier.Banded)o;
 482 
 483             if ((!(this.colorSpace.equals(that.colorSpace))) ||
 484                 (this.dataType != that.dataType) ||
 485                 (this.hasAlpha != that.hasAlpha) ||
 486                 (this.isAlphaPremultiplied != that.isAlphaPremultiplied) ||
 487                 (this.bankIndices.length != that.bankIndices.length) ||
 488                 (this.bandOffsets.length != that.bandOffsets.length)) {
 489                 return false;
 490             }
 491 
 492             for (int i = 0; i < bankIndices.length; i++) {
 493                 if (this.bankIndices[i] != that.bankIndices[i]) {
 494                     return false;
 495                 }
 496             }
 497 
 498             for (int i = 0; i < bandOffsets.length; i++) {
 499                 if (this.bandOffsets[i] != that.bandOffsets[i]) {
 500                     return false;
 501                 }
 502             }
 503 
 504             return true;
 505         }
 506 
 507         public int hashCode() {
 508             return (super.hashCode() +
 509                     (3 * bandOffsets.length) +
 510                     (7 * bankIndices.length) +
 511                     (21 * dataType) +
 512                     (hasAlpha ? 19 : 29));
 513         }
 514     }
 515 
 516     /**
 517      * Returns a specifier for a banded image format that will use a
 518      * <code>ComponentColorModel</code> and a
 519      * <code>BandedSampleModel</code> to store each channel in a
 520      * separate array.
 521      *
 522      * @param colorSpace the desired <code>ColorSpace</code>.
 523      * @param bankIndices an array of <code>int</code>s indicating the
 524      * bank in which each band will be stored.
 525      * @param bandOffsets an array of <code>int</code>s indicating the
 526      * starting offset of each band within its bank.
 527      * @param dataType the desired data type, as one of the enumerations
 528      * from the <code>DataBuffer</code> class.
 529      * @param hasAlpha <code>true</code> if an alpha channel is desired.
 530      * @param isAlphaPremultiplied <code>true</code> if the color channels
 531      * will be premultipled by the alpha channel.
 532      *
 533      * @return an <code>ImageTypeSpecifier</code> with the desired
 534      * characteristics.
 535      *
 536      * @exception IllegalArgumentException if <code>colorSpace</code>
 537      * is <code>null</code>.
 538      * @exception IllegalArgumentException if <code>bankIndices</code>
 539      * is <code>null</code>.
 540      * @exception IllegalArgumentException if <code>bandOffsets</code>
 541      * is <code>null</code>.
 542      * @exception IllegalArgumentException if the lengths of
 543      * <code>bankIndices</code> and <code>bandOffsets</code> differ.
 544      * @exception IllegalArgumentException if
 545      * <code>bandOffsets.length</code> does not equal the number of
 546      * color space components, plus 1 if <code>hasAlpha</code> is
 547      * <code>true</code>.
 548      * @exception IllegalArgumentException if <code>dataType</code> is
 549      * not one of the legal <code>DataBuffer.TYPE_*</code> constants.
 550      */
 551     public static ImageTypeSpecifier
 552         createBanded(ColorSpace colorSpace,
 553                      int[] bankIndices,
 554                      int[] bandOffsets,
 555                      int dataType,
 556                      boolean hasAlpha,
 557                      boolean isAlphaPremultiplied) {
 558         return new ImageTypeSpecifier.Banded(colorSpace,
 559                                              bankIndices,
 560                                              bandOffsets,
 561                                              dataType,
 562                                              hasAlpha,
 563                                              isAlphaPremultiplied);
 564     }
 565 
 566     // Grayscale
 567 
 568     static class Grayscale extends ImageTypeSpecifier {
 569         int bits;
 570         int dataType;
 571         boolean isSigned;
 572         boolean hasAlpha;
 573         boolean isAlphaPremultiplied;
 574 
 575         public Grayscale(int bits,
 576                          int dataType,
 577                          boolean isSigned,
 578                          boolean hasAlpha,
 579                          boolean isAlphaPremultiplied)
 580         {
 581             if (bits != 1 && bits != 2 && bits != 4 &&
 582                 bits != 8 && bits != 16)
 583             {
 584                 throw new IllegalArgumentException("Bad value for bits!");
 585             }
 586             if (dataType != DataBuffer.TYPE_BYTE &&
 587                 dataType != DataBuffer.TYPE_SHORT &&
 588                 dataType != DataBuffer.TYPE_USHORT)
 589             {
 590                 throw new IllegalArgumentException
 591                     ("Bad value for dataType!");
 592             }
 593             if (bits > 8 && dataType == DataBuffer.TYPE_BYTE) {
 594                 throw new IllegalArgumentException
 595                     ("Too many bits for dataType!");
 596             }
 597 
 598             this.bits = bits;
 599             this.dataType = dataType;
 600             this.isSigned = isSigned;
 601             this.hasAlpha = hasAlpha;
 602             this.isAlphaPremultiplied = isAlphaPremultiplied;
 603 
 604             ColorSpace colorSpace = ColorSpace.getInstance(ColorSpace.CS_GRAY);
 605 
 606             if ((bits == 8 && dataType == DataBuffer.TYPE_BYTE) ||
 607                 (bits == 16 &&
 608                  (dataType == DataBuffer.TYPE_SHORT ||
 609                   dataType == DataBuffer.TYPE_USHORT))) {
 610                 // Use component color model & sample model
 611 
 612                 int numBands = hasAlpha ? 2 : 1;
 613                 int transparency =
 614                     hasAlpha ? Transparency.TRANSLUCENT : Transparency.OPAQUE;
 615 
 616 
 617                 int[] nBits = new int[numBands];
 618                 nBits[0] = bits;
 619                 if (numBands == 2) {
 620                     nBits[1] = bits;
 621                 }
 622                 this.colorModel =
 623                     new ComponentColorModel(colorSpace,
 624                                             nBits,
 625                                             hasAlpha,
 626                                             isAlphaPremultiplied,
 627                                             transparency,
 628                                             dataType);
 629 
 630                 int[] bandOffsets = new int[numBands];
 631                 bandOffsets[0] = 0;
 632                 if (numBands == 2) {
 633                     bandOffsets[1] = 1;
 634                 }
 635 
 636                 int w = 1;
 637                 int h = 1;
 638                 this.sampleModel =
 639                     new PixelInterleavedSampleModel(dataType,
 640                                                     w, h,
 641                                                     numBands, w*numBands,
 642                                                     bandOffsets);
 643             } else {
 644                 int numEntries = 1 << bits;
 645                 byte[] arr = new byte[numEntries];
 646                 for (int i = 0; i < numEntries; i++) {
 647                     arr[i] = (byte)(i*255/(numEntries - 1));
 648                 }
 649                 this.colorModel =
 650                     new IndexColorModel(bits, numEntries, arr, arr, arr);
 651 
 652                 this.sampleModel =
 653                     new MultiPixelPackedSampleModel(dataType, 1, 1, bits);
 654             }
 655         }
 656     }
 657 
 658     /**
 659      * Returns a specifier for a grayscale image format that will pack
 660      * pixels of the given bit depth into array elements of
 661      * the specified data type.
 662      *
 663      * @param bits the number of bits per gray value (1, 2, 4, 8, or 16).
 664      * @param dataType the desired data type, as one of the enumerations
 665      * from the <code>DataBuffer</code> class.
 666      * @param isSigned <code>true</code> if negative values are to
 667      * be represented.
 668      *
 669      * @return an <code>ImageTypeSpecifier</code> with the desired
 670      * characteristics.
 671      *
 672      * @exception IllegalArgumentException if <code>bits</code> is
 673      * not one of 1, 2, 4, 8, or 16.
 674      * @exception IllegalArgumentException if <code>dataType</code> is
 675      * not one of <code>DataBuffer.TYPE_BYTE</code>,
 676      * <code>DataBuffer.TYPE_SHORT</code>, or
 677      * <code>DataBuffer.TYPE_USHORT</code>.
 678      * @exception IllegalArgumentException if <code>bits</code> is
 679      * larger than the bit size of the given <code>dataType</code>.
 680      */
 681     public static ImageTypeSpecifier
 682         createGrayscale(int bits,
 683                         int dataType,
 684                         boolean isSigned) {
 685         return new ImageTypeSpecifier.Grayscale(bits,
 686                                                 dataType,
 687                                                 isSigned,
 688                                                 false,
 689                                                 false);
 690     }
 691 
 692     /**
 693      * Returns a specifier for a grayscale plus alpha image format
 694      * that will pack pixels of the given bit depth into array
 695      * elements of the specified data type.
 696      *
 697      * @param bits the number of bits per gray value (1, 2, 4, 8, or 16).
 698      * @param dataType the desired data type, as one of the enumerations
 699      * from the <code>DataBuffer</code> class.
 700      * @param isSigned <code>true</code> if negative values are to
 701      * be represented.
 702      * @param isAlphaPremultiplied <code>true</code> if the luminance channel
 703      * will be premultipled by the alpha channel.
 704      *
 705      * @return an <code>ImageTypeSpecifier</code> with the desired
 706      * characteristics.
 707      *
 708      * @exception IllegalArgumentException if <code>bits</code> is
 709      * not one of 1, 2, 4, 8, or 16.
 710      * @exception IllegalArgumentException if <code>dataType</code> is
 711      * not one of <code>DataBuffer.TYPE_BYTE</code>,
 712      * <code>DataBuffer.TYPE_SHORT</code>, or
 713      * <code>DataBuffer.TYPE_USHORT</code>.
 714      * @exception IllegalArgumentException if <code>bits</code> is
 715      * larger than the bit size of the given <code>dataType</code>.
 716      */
 717     public static ImageTypeSpecifier
 718         createGrayscale(int bits,
 719                         int dataType,
 720                         boolean isSigned,
 721                         boolean isAlphaPremultiplied) {
 722         return new ImageTypeSpecifier.Grayscale(bits,
 723                                                 dataType,
 724                                                 isSigned,
 725                                                 true,
 726                                                 isAlphaPremultiplied);
 727     }
 728 
 729     // Indexed
 730 
 731     static class Indexed extends ImageTypeSpecifier {
 732         byte[] redLUT;
 733         byte[] greenLUT;
 734         byte[] blueLUT;
 735         byte[] alphaLUT = null;
 736         int bits;
 737         int dataType;
 738 
 739         public Indexed(byte[] redLUT,
 740                        byte[] greenLUT,
 741                        byte[] blueLUT,
 742                        byte[] alphaLUT,
 743                        int bits,
 744                        int dataType) {
 745             if (redLUT == null || greenLUT == null || blueLUT == null) {
 746                 throw new IllegalArgumentException("LUT is null!");
 747             }
 748             if (bits != 1 && bits != 2 && bits != 4 &&
 749                 bits != 8 && bits != 16) {
 750                 throw new IllegalArgumentException("Bad value for bits!");
 751             }
 752             if (dataType != DataBuffer.TYPE_BYTE &&
 753                 dataType != DataBuffer.TYPE_SHORT &&
 754                 dataType != DataBuffer.TYPE_USHORT &&
 755                 dataType != DataBuffer.TYPE_INT) {
 756                 throw new IllegalArgumentException
 757                     ("Bad value for dataType!");
 758             }
 759             if ((bits > 8 && dataType == DataBuffer.TYPE_BYTE) ||
 760                 (bits > 16 && dataType != DataBuffer.TYPE_INT)) {
 761                 throw new IllegalArgumentException
 762                     ("Too many bits for dataType!");
 763             }
 764 
 765             int len = 1 << bits;
 766             if (redLUT.length != len ||
 767                 greenLUT.length != len ||
 768                 blueLUT.length != len ||
 769                 (alphaLUT != null && alphaLUT.length != len)) {
 770                 throw new IllegalArgumentException("LUT has improper length!");
 771             }
 772             this.redLUT = redLUT.clone();
 773             this.greenLUT = greenLUT.clone();
 774             this.blueLUT = blueLUT.clone();
 775             if (alphaLUT != null) {
 776                 this.alphaLUT = alphaLUT.clone();
 777             }
 778             this.bits = bits;
 779             this.dataType = dataType;
 780 
 781             if (alphaLUT == null) {
 782                 this.colorModel = new IndexColorModel(bits,
 783                                                       redLUT.length,
 784                                                       redLUT,
 785                                                       greenLUT,
 786                                                       blueLUT);
 787             } else {
 788                 this.colorModel = new IndexColorModel(bits,
 789                                                       redLUT.length,
 790                                                       redLUT,
 791                                                       greenLUT,
 792                                                       blueLUT,
 793                                                       alphaLUT);
 794             }
 795 
 796             if ((bits == 8 && dataType == DataBuffer.TYPE_BYTE) ||
 797                 (bits == 16 &&
 798                  (dataType == DataBuffer.TYPE_SHORT ||
 799                   dataType == DataBuffer.TYPE_USHORT))) {
 800                 int[] bandOffsets = { 0 };
 801                 this.sampleModel =
 802                     new PixelInterleavedSampleModel(dataType,
 803                                                     1, 1, 1, 1,
 804                                                     bandOffsets);
 805             } else {
 806                 this.sampleModel =
 807                     new MultiPixelPackedSampleModel(dataType, 1, 1, bits);
 808             }
 809         }
 810     }
 811 
 812     /**
 813      * Returns a specifier for an indexed-color image format that will pack
 814      * index values of the given bit depth into array elements of
 815      * the specified data type.
 816      *
 817      * @param redLUT an array of <code>byte</code>s containing
 818      * the red values for each index.
 819      * @param greenLUT an array of <code>byte</code>s containing * the
 820      *  green values for each index.
 821      * @param blueLUT an array of <code>byte</code>s containing the
 822      * blue values for each index.
 823      * @param alphaLUT an array of <code>byte</code>s containing the
 824      * alpha values for each index, or <code>null</code> to create a
 825      * fully opaque LUT.
 826      * @param bits the number of bits in each index.
 827      * @param dataType the desired output type, as one of the enumerations
 828      * from the <code>DataBuffer</code> class.
 829      *
 830      * @return an <code>ImageTypeSpecifier</code> with the desired
 831      * characteristics.
 832      *
 833      * @exception IllegalArgumentException if <code>redLUT</code> is
 834      * <code>null</code>.
 835      * @exception IllegalArgumentException if <code>greenLUT</code> is
 836      * <code>null</code>.
 837      * @exception IllegalArgumentException if <code>blueLUT</code> is
 838      * <code>null</code>.
 839      * @exception IllegalArgumentException if <code>bits</code> is
 840      * not one of 1, 2, 4, 8, or 16.
 841      * @exception IllegalArgumentException if the
 842      * non-<code>null</code> LUT parameters do not have lengths of
 843      * exactly {@code 1 << bits}.
 844      * @exception IllegalArgumentException if <code>dataType</code> is
 845      * not one of <code>DataBuffer.TYPE_BYTE</code>,
 846      * <code>DataBuffer.TYPE_SHORT</code>,
 847      * <code>DataBuffer.TYPE_USHORT</code>,
 848      * or <code>DataBuffer.TYPE_INT</code>.
 849      * @exception IllegalArgumentException if <code>bits</code> is
 850      * larger than the bit size of the given <code>dataType</code>.
 851      */
 852     public static ImageTypeSpecifier
 853         createIndexed(byte[] redLUT,
 854                       byte[] greenLUT,
 855                       byte[] blueLUT,
 856                       byte[] alphaLUT,
 857                       int bits,
 858                       int dataType) {
 859         return new ImageTypeSpecifier.Indexed(redLUT,
 860                                               greenLUT,
 861                                               blueLUT,
 862                                               alphaLUT,
 863                                               bits,
 864                                               dataType);
 865     }
 866 
 867     /**
 868      * Returns an <code>ImageTypeSpecifier</code> that encodes
 869      * one of the standard <code>BufferedImage</code> types
 870      * (other than <code>TYPE_CUSTOM</code>).
 871      *
 872      * @param bufferedImageType an int representing one of the standard
 873      * <code>BufferedImage</code> types.
 874      *
 875      * @return an <code>ImageTypeSpecifier</code> with the desired
 876      * characteristics.
 877      *
 878      * @exception IllegalArgumentException if
 879      * <code>bufferedImageType</code> is not one of the standard
 880      * types, or is equal to <code>TYPE_CUSTOM</code>.
 881      *
 882      * @see java.awt.image.BufferedImage
 883      * @see java.awt.image.BufferedImage#TYPE_INT_RGB
 884      * @see java.awt.image.BufferedImage#TYPE_INT_ARGB
 885      * @see java.awt.image.BufferedImage#TYPE_INT_ARGB_PRE
 886      * @see java.awt.image.BufferedImage#TYPE_INT_BGR
 887      * @see java.awt.image.BufferedImage#TYPE_3BYTE_BGR
 888      * @see java.awt.image.BufferedImage#TYPE_4BYTE_ABGR
 889      * @see java.awt.image.BufferedImage#TYPE_4BYTE_ABGR_PRE
 890      * @see java.awt.image.BufferedImage#TYPE_USHORT_565_RGB
 891      * @see java.awt.image.BufferedImage#TYPE_USHORT_555_RGB
 892      * @see java.awt.image.BufferedImage#TYPE_BYTE_GRAY
 893      * @see java.awt.image.BufferedImage#TYPE_USHORT_GRAY
 894      * @see java.awt.image.BufferedImage#TYPE_BYTE_BINARY
 895      * @see java.awt.image.BufferedImage#TYPE_BYTE_INDEXED
 896      */
 897     public static
 898         ImageTypeSpecifier createFromBufferedImageType(int bufferedImageType) {
 899         if (bufferedImageType >= BufferedImage.TYPE_INT_RGB &&
 900             bufferedImageType <= BufferedImage.TYPE_BYTE_INDEXED) {
 901             return getSpecifier(bufferedImageType);
 902         } else if (bufferedImageType == BufferedImage.TYPE_CUSTOM) {
 903             throw new IllegalArgumentException("Cannot create from TYPE_CUSTOM!");
 904         } else {
 905             throw new IllegalArgumentException("Invalid BufferedImage type!");
 906         }
 907     }
 908 
 909     /**
 910      * Returns an <code>ImageTypeSpecifier</code> that encodes the
 911      * layout of a <code>RenderedImage</code> (which may be a
 912      * <code>BufferedImage</code>).
 913      *
 914      * @param image a <code>RenderedImage</code>.
 915      *
 916      * @return an <code>ImageTypeSpecifier</code> with the desired
 917      * characteristics.
 918      *
 919      * @exception IllegalArgumentException if <code>image</code> is
 920      * <code>null</code>.
 921      */
 922     public static
 923         ImageTypeSpecifier createFromRenderedImage(RenderedImage image) {
 924         if (image == null) {
 925             throw new IllegalArgumentException("image == null!");
 926         }
 927 
 928         if (image instanceof BufferedImage) {
 929             int bufferedImageType = ((BufferedImage)image).getType();
 930             if (bufferedImageType != BufferedImage.TYPE_CUSTOM) {
 931                 return getSpecifier(bufferedImageType);
 932             }
 933         }
 934 
 935         return new ImageTypeSpecifier(image);
 936     }
 937 
 938     /**
 939      * Returns an int containing one of the enumerated constant values
 940      * describing image formats from <code>BufferedImage</code>.
 941      *
 942      * @return an <code>int</code> representing a
 943      * <code>BufferedImage</code> type.
 944      *
 945      * @see java.awt.image.BufferedImage
 946      * @see java.awt.image.BufferedImage#TYPE_CUSTOM
 947      * @see java.awt.image.BufferedImage#TYPE_INT_RGB
 948      * @see java.awt.image.BufferedImage#TYPE_INT_ARGB
 949      * @see java.awt.image.BufferedImage#TYPE_INT_ARGB_PRE
 950      * @see java.awt.image.BufferedImage#TYPE_INT_BGR
 951      * @see java.awt.image.BufferedImage#TYPE_3BYTE_BGR
 952      * @see java.awt.image.BufferedImage#TYPE_4BYTE_ABGR
 953      * @see java.awt.image.BufferedImage#TYPE_4BYTE_ABGR_PRE
 954      * @see java.awt.image.BufferedImage#TYPE_USHORT_565_RGB
 955      * @see java.awt.image.BufferedImage#TYPE_USHORT_555_RGB
 956      * @see java.awt.image.BufferedImage#TYPE_BYTE_GRAY
 957      * @see java.awt.image.BufferedImage#TYPE_USHORT_GRAY
 958      * @see java.awt.image.BufferedImage#TYPE_BYTE_BINARY
 959      * @see java.awt.image.BufferedImage#TYPE_BYTE_INDEXED
 960      */
 961     public int getBufferedImageType() {
 962         BufferedImage bi = createBufferedImage(1, 1);
 963         return bi.getType();
 964     }
 965 
 966     /**
 967      * Return the number of color components
 968      * specified by this object.  This is the same value as returned by
 969      * <code>ColorModel.getNumComponents</code>
 970      *
 971      * @return the number of components in the image.
 972      */
 973     public int getNumComponents() {
 974         return colorModel.getNumComponents();
 975     }
 976 
 977     /**
 978      * Return the number of bands
 979      * specified by this object.  This is the same value as returned by
 980      * <code>SampleModel.getNumBands</code>
 981      *
 982      * @return the number of bands in the image.
 983      */
 984     public int getNumBands() {
 985         return sampleModel.getNumBands();
 986     }
 987 
 988     /**
 989      * Return the number of bits used to represent samples of the given band.
 990      *
 991      * @param band the index of the band to be queried, as an
 992      * int.
 993      *
 994      * @return an int specifying a number of bits.
 995      *
 996      * @exception IllegalArgumentException if <code>band</code> is
 997      * negative or greater than the largest band index.
 998      */
 999     public int getBitsPerBand(int band) {
1000         if (band < 0 | band >= getNumBands()) {
1001             throw new IllegalArgumentException("band out of range!");
1002         }
1003         return sampleModel.getSampleSize(band);
1004     }
1005 
1006     /**
1007      * Returns a <code>SampleModel</code> based on the settings
1008      * encapsulated within this object.  The width and height of the
1009      * <code>SampleModel</code> will be set to arbitrary values.
1010      *
1011      * @return a <code>SampleModel</code> with arbitrary dimensions.
1012      */
1013     public SampleModel getSampleModel() {
1014         return sampleModel;
1015     }
1016 
1017     /**
1018      * Returns a <code>SampleModel</code> based on the settings
1019      * encapsulated within this object.  The width and height of the
1020      * <code>SampleModel</code> will be set to the supplied values.
1021      *
1022      * @param width the desired width of the returned <code>SampleModel</code>.
1023      * @param height the desired height of the returned
1024      * <code>SampleModel</code>.
1025      *
1026      * @return a <code>SampleModel</code> with the given dimensions.
1027      *
1028      * @exception IllegalArgumentException if either <code>width</code> or
1029      * <code>height</code> are negative or zero.
1030      * @exception IllegalArgumentException if the product of
1031      * <code>width</code> and <code>height</code> is greater than
1032      * <code>Integer.MAX_VALUE</code>
1033      */
1034     public SampleModel getSampleModel(int width, int height) {
1035         if ((long)width*height > Integer.MAX_VALUE) {
1036             throw new IllegalArgumentException
1037                 ("width*height > Integer.MAX_VALUE!");
1038         }
1039         return sampleModel.createCompatibleSampleModel(width, height);
1040     }
1041 
1042     /**
1043      * Returns the <code>ColorModel</code> specified by this object.
1044      *
1045      * @return a <code>ColorModel</code>.
1046      */
1047     public ColorModel getColorModel() {
1048         return colorModel;
1049     }
1050 
1051     /**
1052      * Creates a <code>BufferedImage</code> with a given width and
1053      * height according to the specification embodied in this object.
1054      *
1055      * @param width the desired width of the returned
1056      * <code>BufferedImage</code>.
1057      * @param height the desired height of the returned
1058      * <code>BufferedImage</code>.
1059      *
1060      * @return a new <code>BufferedImage</code>
1061      *
1062      * @exception IllegalArgumentException if either <code>width</code> or
1063      * <code>height</code> are negative or zero.
1064      * @exception IllegalArgumentException if the product of
1065      * <code>width</code> and <code>height</code> is greater than
1066      * <code>Integer.MAX_VALUE</code>, or if the number of array
1067      * elements needed to store the image is greater than
1068      * <code>Integer.MAX_VALUE</code>.
1069      */
1070     public BufferedImage createBufferedImage(int width, int height) {
1071         try {
1072             SampleModel sampleModel = getSampleModel(width, height);
1073             WritableRaster raster =
1074                 Raster.createWritableRaster(sampleModel,
1075                                             new Point(0, 0));
1076             return new BufferedImage(colorModel, raster,
1077                                      colorModel.isAlphaPremultiplied(),
1078                                      new Hashtable());
1079         } catch (NegativeArraySizeException e) {
1080             // Exception most likely thrown from a DataBuffer constructor
1081             throw new IllegalArgumentException
1082                 ("Array size > Integer.MAX_VALUE!");
1083         }
1084     }
1085 
1086     /**
1087      * Returns <code>true</code> if the given <code>Object</code> is
1088      * an <code>ImageTypeSpecifier</code> and has a
1089      * <code>SampleModel</code> and <code>ColorModel</code> that are
1090      * equal to those of this object.
1091      *
1092      * @param o the <code>Object</code> to be compared for equality.
1093      *
1094      * @return <code>true</code> if the given object is an equivalent
1095      * <code>ImageTypeSpecifier</code>.
1096      */
1097     public boolean equals(Object o) {
1098         if ((o == null) || !(o instanceof ImageTypeSpecifier)) {
1099             return false;
1100         }
1101 
1102         ImageTypeSpecifier that = (ImageTypeSpecifier)o;
1103         return (colorModel.equals(that.colorModel)) &&
1104             (sampleModel.equals(that.sampleModel));
1105     }
1106 
1107     /**
1108      * Returns the hash code for this ImageTypeSpecifier.
1109      *
1110      * @return a hash code for this ImageTypeSpecifier
1111      */
1112     public int hashCode() {
1113         return (9 * colorModel.hashCode()) + (14 * sampleModel.hashCode());
1114     }
1115 
1116     private static ImageTypeSpecifier getSpecifier(int type) {
1117         if (BISpecifier[type] == null) {
1118             BISpecifier[type] = createSpecifier(type);
1119         }
1120         return BISpecifier[type];
1121     }
1122 
1123     private static ImageTypeSpecifier createSpecifier(int type) {
1124         switch(type) {
1125           case BufferedImage.TYPE_INT_RGB:
1126               return createPacked(sRGB,
1127                                   0x00ff0000,
1128                                   0x0000ff00,
1129                                   0x000000ff,
1130                                   0x0,
1131                                   DataBuffer.TYPE_INT,
1132                                   false);
1133 
1134           case BufferedImage.TYPE_INT_ARGB:
1135               return createPacked(sRGB,
1136                                   0x00ff0000,
1137                                   0x0000ff00,
1138                                   0x000000ff,
1139                                   0xff000000,
1140                                   DataBuffer.TYPE_INT,
1141                                   false);
1142 
1143           case BufferedImage.TYPE_INT_ARGB_PRE:
1144               return createPacked(sRGB,
1145                                   0x00ff0000,
1146                                   0x0000ff00,
1147                                   0x000000ff,
1148                                   0xff000000,
1149                                   DataBuffer.TYPE_INT,
1150                                   true);
1151 
1152           case BufferedImage.TYPE_INT_BGR:
1153               return createPacked(sRGB,
1154                                   0x000000ff,
1155                                   0x0000ff00,
1156                                   0x00ff0000,
1157                                   0x0,
1158                                   DataBuffer.TYPE_INT,
1159                                   false);
1160 
1161           case BufferedImage.TYPE_3BYTE_BGR:
1162               return createInterleaved(sRGB,
1163                                        new int[] { 2, 1, 0 },
1164                                        DataBuffer.TYPE_BYTE,
1165                                        false,
1166                                        false);
1167 
1168           case BufferedImage.TYPE_4BYTE_ABGR:
1169               return createInterleaved(sRGB,
1170                                        new int[] { 3, 2, 1, 0 },
1171                                        DataBuffer.TYPE_BYTE,
1172                                        true,
1173                                        false);
1174 
1175           case BufferedImage.TYPE_4BYTE_ABGR_PRE:
1176               return createInterleaved(sRGB,
1177                                        new int[] { 3, 2, 1, 0 },
1178                                        DataBuffer.TYPE_BYTE,
1179                                        true,
1180                                        true);
1181 
1182           case BufferedImage.TYPE_USHORT_565_RGB:
1183               return createPacked(sRGB,
1184                                   0xF800,
1185                                   0x07E0,
1186                                   0x001F,
1187                                   0x0,
1188                                   DataBuffer.TYPE_USHORT,
1189                                   false);
1190 
1191           case BufferedImage.TYPE_USHORT_555_RGB:
1192               return createPacked(sRGB,
1193                                   0x7C00,
1194                                   0x03E0,
1195                                   0x001F,
1196                                   0x0,
1197                                   DataBuffer.TYPE_USHORT,
1198                                   false);
1199 
1200           case BufferedImage.TYPE_BYTE_GRAY:
1201             return createGrayscale(8,
1202                                    DataBuffer.TYPE_BYTE,
1203                                    false);
1204 
1205           case BufferedImage.TYPE_USHORT_GRAY:
1206             return createGrayscale(16,
1207                                    DataBuffer.TYPE_USHORT,
1208                                    false);
1209 
1210           case BufferedImage.TYPE_BYTE_BINARY:
1211               return createGrayscale(1,
1212                                      DataBuffer.TYPE_BYTE,
1213                                      false);
1214 
1215           case BufferedImage.TYPE_BYTE_INDEXED:
1216           {
1217 
1218               BufferedImage bi =
1219                   new BufferedImage(1, 1, BufferedImage.TYPE_BYTE_INDEXED);
1220               IndexColorModel icm = (IndexColorModel)bi.getColorModel();
1221               int mapSize = icm.getMapSize();
1222               byte[] redLUT = new byte[mapSize];
1223               byte[] greenLUT = new byte[mapSize];
1224               byte[] blueLUT = new byte[mapSize];
1225               byte[] alphaLUT = new byte[mapSize];
1226 
1227               icm.getReds(redLUT);
1228               icm.getGreens(greenLUT);
1229               icm.getBlues(blueLUT);
1230               icm.getAlphas(alphaLUT);
1231 
1232               return createIndexed(redLUT, greenLUT, blueLUT, alphaLUT,
1233                                    8,
1234                                    DataBuffer.TYPE_BYTE);
1235           }
1236           default:
1237               throw new IllegalArgumentException("Invalid BufferedImage type!");
1238         }
1239     }
1240 
1241 }
--- EOF ---